Enabling forwarding allows a user to forward all their MTL e-mail to another valid e-mail address (e.g. their MIT Athena address). Users who do this will then be required to read their MTL e-mail using the aforementioned e-mail account.
You can now change your MTL Forwarding settings on-line by going to MUMMS and logging in. Once there you can click on 'View Your E-mail Settings' in order to view/change your current MTL e-mail settings.